Novel vacuum jig for circuit board needle point test

Abstract

The utility model provides the novel vacuum jig for the circuit board needle point test, which can be quickly reset and open the upper cover after long-time vacuum press fit so as to meet the use requirements of a Tairida TSLX2 machine. Any end of the upper die aluminum frame and any end of the lower die aluminum frame are hinged to each other, uncovering assemblies are arranged on the two side edges between the upper die aluminum frame and the lower die aluminum frame, an upper needle plate and a lower carrier plate are sequentially arranged in the upper die aluminum frame from top to bottom, a lower needle plate is arranged in the lower die aluminum frame, and each uncovering assembly comprises an uncovering air cylinder, a compression spring and a vertical connecting plate. The vertical connecting plate is fixedly arranged at the end, close to the hinged position, of the upper die aluminum frame, one end of the uncovering air cylinder is rotationally connected to the upper end of the vertical connecting plate, and the other end of the uncovering air cylinder is rotationally connected to the edge of the lower end face of the upper die aluminum frame. When the jig is in a closed state, the compression spring is in a compression energy storage state. The utility model is suitable for the technical field of ICT electronic testing.

Description

Technical Field

[0001] This utility model relates to the field of ICT electronic testing technology, and in particular to a novel vacuum fixture for pinpoint testing of circuit boards. Background Technology

[0002] Currently, ICT fixtures mainly consist of a lower mold, a carrier board, and an upper mold. Vacuum and mechanical methods are primarily used for testing PCBA boards. The vacuum method works by sealing the entire fixture. The board under test (DUT) is placed on the carrier board, and internal air is evacuated through the lower mold's suction port, causing the upper pin plate of the upper mold to move downwards. This allows pressure bars or blocks pre-designed on the upper pin plate to press against the DUT, bringing the lower mold probes into contact with the DUT for testing. The existing Teradyne TSLX2 machine, due to its numerous and complexly distributed test pins, requires rapid downward movement of the fixture carrier board and prolonged pressing during vacuum testing. Therefore, after testing, the connected pins are difficult to separate, and the upper mold cover is also difficult to open, affecting the overall testing experience and efficiency. Thus, a single-piece fixture suitable for the Teradyne TSLX2 machine needs to be designed, which allows for rapid carrier board downward movement and easy separation and opening of the cover. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a new type of vacuum fixture for circuit board pin point testing that can be quickly reset and the top cover opened after long-term vacuum pressing to meet the usage requirements of Teradyne TSLX2 machine.

[0004] The technical solution adopted by this utility model is as follows: This utility model includes an upper mold aluminum frame and a lower mold aluminum frame that are hinged to each other at either end. Opening components are provided on both sides between the upper mold aluminum frame and the lower mold aluminum frame. An upper needle plate and a lowering plate are sequentially arranged from top to bottom inside the upper mold aluminum frame. A lower needle plate is provided inside the lower mold aluminum frame. The opening component includes an opening cylinder, a compression spring, and a vertical connecting plate. The vertical connecting plate is fixedly arranged on the upper mold aluminum frame near the hinge. One end of the opening cylinder is rotatably connected to the upper end of the vertical connecting plate, and the other end is rotatably connected to the lower edge of the upper mold aluminum frame. One end of the compression spring is rotatably connected to the lower end of the vertical connecting plate, and the other end is rotatably connected to the lower edge of the upper mold aluminum frame. When the fixture is closed, the compression spring is in a compressed and energy-storing state.

[0005] Furthermore, a plurality of reset elements are provided between the upper needle plate and the inner wall of the upper mold aluminum frame. The reset elements include a limiting block, a height equalizing screw, and a reset spring. The limiting block is fixedly disposed on the inner side wall of the upper mold aluminum frame. The height equalizing screw passes through the limiting block and is connected to the upper needle plate at its bottom. A limiting frustum is provided at the top of the height equalizing screw. The reset spring is sleeved on the height equalizing screw and is located between the limiting frustum and the limiting block.

[0006] Furthermore, several vacuum holes are provided at the bottom of the lower mold aluminum frame and on the lower needle plate.

[0007] Furthermore, handles are provided on the outer walls of both sides of the upper mold aluminum frame, and a lifting handle is provided on the other end face that is hinged to the lower mold aluminum frame.

[0008] Finally, a locking assembly is provided on the upper end face of both sides of the lower mold aluminum frame, including a locking bracket, a locking rod and a buffer spring. The upper mold aluminum frame has a locking hole at the position corresponding to the locking assembly. The locking rod is threadedly engaged with the locking bracket and aligned with the locking hole.

[0009] Compared with existing technologies, this utility model uses the opening cylinder to provide stable assistance in opening the upper mold aluminum frame. Simultaneously, the compression spring, positioned in the same direction as the opening cylinder, releases its previously stored energy during the opening process, further assisting in opening the upper mold aluminum frame. Furthermore, a reset element is provided between the upper needle plate and the upper mold aluminum frame. During vacuum testing, the upper needle plate pulls the reset spring as it moves downwards. Therefore, after the vacuum is broken at the end of the test, the reset spring pulls the upper needle plate to reset. Thus, after prolonged vacuum pressing, the upper cover can be quickly reset and opened, meeting the usage requirements of the Teradyne TSLX2 machine. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0012] Figure 3 This is an exploded schematic diagram of the locking assembly;

[0013] Figure 4 This is a schematic diagram of the structure of the reset element. Detailed Implementation

[0014] like Figures 1 to 4As shown, this utility model includes an upper mold aluminum frame 1 and a lower mold aluminum frame 2 hinged together at either end. Opening assemblies are provided on both sides between the upper mold aluminum frame 1 and the lower mold aluminum frame 2. An upper needle plate 3 and a lowering plate 4 are sequentially arranged from top to bottom inside the upper mold aluminum frame 1. A lower needle plate 5 is arranged inside the lower mold aluminum frame 2. The opening assembly includes an opening cylinder 6, a compression spring 7, and a vertical connecting plate 8. The vertical connecting plate 8 is fixedly arranged on the upper mold aluminum frame 1 near the hinge. One end of the opening cylinder 6 is rotatably connected to the upper end of the vertical connecting plate 8, and the other end is rotatably connected to the lower edge of the upper mold aluminum frame 1. One end of the compression spring 7 is rotatably connected to the lower end of the vertical connecting plate 8, and the other end is rotatably connected to the lower edge of the upper mold aluminum frame 1. When the fixture is closed, the compression spring 7 is in a compressed and energy-storing state. Several vacuum holes 10 are provided at the bottom of the lower mold aluminum frame 2 and on the lower needle plate 5. Handles 11 are provided on the outer walls of both sides of the upper mold aluminum frame 1, and handles 13 are provided on the other end face that is hinged to the lower mold aluminum frame 2.

[0015] A plurality of reset elements 9 are provided between the upper needle plate 3 and the inner wall of the upper mold aluminum frame 1. The reset elements 9 include a limiting block 91, an equalizing screw 92, and a reset spring 93. The limiting block 91 is fixedly disposed on the inner side wall of the upper mold aluminum frame 1. The equalizing screw 92 passes through the limiting block 91 and is connected to the upper needle plate 3 at its bottom. A limiting frustum 94 is provided at the top of the equalizing screw 92. The reset spring 93 is sleeved on the equalizing screw 92 and is located between the limiting frustum 94 and the limiting block 91.

[0016] A locking assembly 12 is also provided on the upper end face of both sides of the lower mold aluminum frame 2, including a locking bracket 121, a locking rod 122 and a buffer spring 123. The upper mold aluminum frame 1 is provided with a locking hole 124 corresponding to the position of the locking assembly 12. The locking rod 122 is threadedly engaged with the locking bracket 121 and aligned with the locking hole 124.

[0017] This invention employs the cap-opening cylinder 6 to provide stable assistance in opening the upper mold aluminum frame 1. Simultaneously, the compression spring 7, positioned in the same direction as the cap-opening cylinder 6, releases its previously compressed and stored energy during the opening process, further assisting in opening the upper mold aluminum frame. Furthermore, a reset element is provided between the upper needle plate and the upper mold aluminum frame. During vacuum testing, the upper needle plate pulls the reset spring as it moves downwards. Therefore, after the vacuum is broken at the end of the test, the reset spring pulls the upper needle plate to complete its reset.

[0018] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel vacuum fixture for pinpoint testing of circuit boards, comprising an upper mold aluminum frame (1) and a lower mold aluminum frame (2) hinged together at either end, wherein opening assemblies are provided on both sides between the upper mold aluminum frame (1) and the lower mold aluminum frame (2), an upper pin plate (3) and a lowering plate (4) are arranged sequentially from top to bottom inside the upper mold aluminum frame (1), and a lower pin plate (5) is arranged inside the lower mold aluminum frame (2), characterized in that: The opening assembly includes an opening cylinder (6), a compression spring (7), and a vertical connecting plate (8). The vertical connecting plate (8) is fixedly mounted on the upper mold aluminum frame (1) near the hinge. One end of the opening cylinder (6) is rotatably connected to the upper end of the vertical connecting plate (8), and the other end is rotatably connected to the lower edge of the upper mold aluminum frame (1). One end of the compression spring (7) is rotatably connected to the lower end of the vertical connecting plate (8), and the other end is rotatably connected to the lower edge of the upper mold aluminum frame (1). When the fixture is closed, the compression spring (7) is in a compressed and stored state.

2. A novel vacuum fixture for circuit board pinpoint testing according to claim 1, characterized in that: A plurality of reset elements (9) are provided between the upper needle plate (3) and the inner wall of the upper mold aluminum frame (1). The reset elements (9) include a limiting block (91), an equalizing screw (92), and a reset spring (93). The limiting block (91) is fixedly disposed on the inner side wall of the upper mold aluminum frame (1). The equalizing screw (92) passes through the limiting block (91) and is connected to the upper needle plate (3) at its bottom. A limiting frustum (94) is provided at the top of the equalizing screw (92). The reset spring (93) is sleeved on the equalizing screw (92) and is located between the limiting frustum (94) and the limiting block (91).

3. A novel vacuum fixture for circuit board pinpoint testing according to claim 2, characterized in that: Several vacuum holes (10) are provided on the bottom of the lower mold aluminum frame (2) and on the lower needle plate (5).

4. A novel vacuum fixture for circuit board pinpoint testing according to claim 3, characterized in that: Handles (11) are provided on the outer walls of both sides of the upper mold aluminum frame (1), and a handle (13) is provided on the other end face that is hinged to the lower mold aluminum frame (2).

5. A novel vacuum fixture for circuit board pinpoint testing according to claim 4, characterized in that: A locking assembly (12) is also provided on the upper end face of both sides of the lower mold aluminum frame (2), including a locking bracket (121), a locking rod (122) and a buffer spring (123). The upper mold aluminum frame (1) is provided with a locking hole (124) corresponding to the position of the locking assembly (12). The locking rod (122) is threadedly engaged with the locking bracket (121) and aligned with the locking hole (124).

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